The word Isabeline is misspelled against Isabelline, an adjective meaning "an isabel isabella col."
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Isabelline has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings isabe & ine which should not be misspelled with single 'L'
Wrong Spelling:  isabe-l-ine 
Correct Spelling:  isabe-ll-ine 
Find more wrongly spelled words of Isabelline to spell it well.